var currentMenu='';
		var menuTimer=null;
				
		function show_menu(title) {
			// Erstmal alles ausblenden
			hide_menu();
			// Einen bestehenden Menu-Timeout anhalten
			if(menuTimer !=null) {
				clearTimeout(menuTimer);
			}
			var menutitle='main_'+title;
			var themain=document.getElementById(menutitle);
			var subtitle='sub_'+title;
			var thesub=document.getElementById(subtitle);
			// Erscheinungsbild aendern
			themain.style.background='#3D3D3D url(resources/images/b_navi_dunkel_blanko.gif) no-repeat top right';
			themain.style.color='#ffffff'
			thesub.style.display='block';
			// Variable mit dem aktuellen Menuenamen updaten
			currentMenu=title;
		}


		function hide_menu() {
			if(currentMenu !='') {
				var menutitle='main_'+currentMenu;
				var themain=document.getElementById(menutitle);
				var subtitle='sub_'+currentMenu;
				var thesub=document.getElementById(subtitle);
				// Erscheinungsbild zuruecksetzen
				themain.style.background='#cccccc url(resources/images/b_navi_hell.gif) no-repeat top right';
				themain.style.color='#000000'
				thesub.style.display='none';
			} else {
				return;
			}
		}

		function slow_hide_menu(title) {
			menuTimer=setTimeout('hide_menu()',500);
		}


		function clear_menus() {
			// Einen bestehenden Menu-Timeout anhalten
			if(menuTimer !=null) {
				clearTimeout(menuTimer);
			}
			var titles=new Array(
				'wohnungsmarkt',
				'unternehmen',
				'nachrichten'			
			);
			for(var i=0;i<titles.length;i++) {
				if(document.getElementById(menutitle)) {
					var menutitle='main_'+titles[i];
					var themain=document.getElementById(menutitle);
					var subtitle='sub_'+titles[i];
					var thesub=document.getElementById(subtitle);
					// Erscheinungsbild zuruecksetzen
					themain.style.background='#cccccc url(resources/images/b_navi_hell.gif) no-repeat top left';
					themain.style.color='#000000'
					thesub.style.display='none';
				}
			}
		}
		
		function hide_main(title) {
			
			setTimeout('hide_main(title)',500);
		}
		
		
		function init() {
			document.body.onclick=clear_menus;
		}